The library has many resources with information and critical reviews about films and film reviews. Al of these resources are on the page on the library website called: Popular Databases
You might want to start with newspapers:
Newsbank does not include the New York Times, Washington Post, and Wall Street Journal. Each of those newspapers has hightly respected film critics who write reviews. You can subscribe to them for free as a KU student. Your subscription includes a short backfile.
Often referred to as the EBSCO database, (EBSCO is the name of the distributor), this database is a good source for information about a film, or film reviews. Actual films are not here.
Like Academic Search Ultimate, a full-text, multidisciplinary database with articles from major journals, magazines, and newspapers on all subjects.